CVE-2026-1527

Katalog CVE

CVSS 4.6 · Medium EPSS 0,28%

Kerentanan Improper Neutralization of CRLF Sequences ('CRLF Injection') pada nodejs undici. Skor CVSS 3.1 4.6 (Medium) menurut CNA.

Deskripsi (NVD)

ImpactWhen an application passes user-controlled input to the upgrade option of client.request(), an attacker can inject CRLF sequences (\r\n) to: * Inject arbitrary HTTP headers * Terminate the HTTP request prematurely and smuggle raw data to non-HTTP services (Redis, Memcached, Elasticsearch) The vulnerability exists because undici writes the upgrade value directly to the socket without validating for invalid header characters: // lib/dispatcher/client-h1.js:1121 if (upgrade) { header += `connection: upgrade\r\nupgrade: ${upgrade}\r\n` }

Rincian

Terbit di NVD

12 Maret 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

4.6 (Medium), sumber CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')

EPSS (30 hari)

0,28% peluang dieksploitasi; lebih tinggi dari 19,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://cna.openjsf.org/security-advisories.html advisory vendor
• https://github.com/nodejs/undici/security/advisories/GHSA-4992-7rv2-5pvq mitigasi · patch · advisory vendor
• https://hackerone.com/reports/3487198 permissions required